Metal fly-screen.



E. T. BURROWES. METAL FLY SCREEN.

APPLICATION FILED SEPT.2,1913.

1, 1 20,684. Patented Dec. 15, 1914.

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EDWARD T. BURROWES, OF PORTLAND, MAINE.

METAL FLY-SCREEN.

Specification of Letters Patent.

Patented Dec. 15, 1914.

Application filed September 2, 1913. Serial No. 787,698.

To all whom it may concern:

Be it known that I, EDVARD T. BUR- nowns, citizen of the United States,residing at Portland, in the coimty of Cumberland and State of Maine,have invented certain new and useful Improvements in Metal FlyScreens,of which the following is a specification.

This invention rel-ates to metal fly screens, and more particularly toscreens of this character having rigid frames constructed entirely ofmetal bars and corner pieces.

The objects of the invention are to provide a frame which can beassembled at a comparatively small labor cost, and which when soassembled will be exceptionally strong and rigid and, at the same time,extremely neat, ornamental and finished in appearance.

To this end the invention consists in the construction and arrangementof parts hereinafter described and claimed, and illustrated in theaccompanying drawing, in which,

Figure 1 is a fragmentary view of one side of the improved screen framewith the parts assembled; Fig. 2 is a sectional view thereof,substantially on the line 22 of Fig. 1. looking in the direction of thearrow; Fig. 3 is a sectional view taken through the corner and one ofthe side members; Fig. is a view of a corner of the frame itself,showing the method of manufacture; Fig. 5 is a view similar to Fig. 1,showing a different form of holding strip; Fig. 6 is a section throughone side of the frame shown in Fig. 5.

This invention is in the nature of an improvement over the constructionshown in the co-pending application of George E. Davis, filed Sept. 2,1913, Serial No. 787,694.

In the present invention the same method of assembling the frame isemployed as disclosed in such former application, namely, the provisionof rigid forged corner pieces, and the welding of the side membersthereto. In the present case, however, the arms of the corner pieces andthe side members are channel shaped in cross section.

In the drawings. A designates one of the improved corner pieces, while Band C indicate the side members. The arms of the corner pieces and alsothe side members are provided with flanges or heads 1 and 2, the innerflange 1 preferably being of less height than the outer flange, and saidflanges preferably having rounded upper edges. The frame is constructedby placing the side members B and C, of suitable length, end to end withthe arms of the corner pieces, and electrically welding them together,as indicated at w in Fig. 1. After the frame has been thus formed, thewire fabric E is laid 'over the frame and holding strips D are thenplaced in the channel of the frame and secured by suitable fasteningmeans, such as screws or rivets 10, in such a manner that the fabric isdrawn over the inner flange 1 and down into the channel under the strip,as clearly shown in Fig. 2. The raw edges of the fabric may then be cutoil flush with the strip by running a knife along the outer edge of thestrip at the point marked 6 in Fig. 2.

It will be seen that the strip and fabric lie below the level of theouter flange 2 of the frame.

In order to avoid the necessity of cutting the holding strips D to exactlengths, a corner plate F is provided and formed to fit the channel inthe corner piece A. This plate is arranged to overlap the ends of theholding strip D, as indicated at 7 in Fig. 1, so as to produce afinished appearance. It is obvious that the strips D may therefore becut off approximately the proper length, and since they are hidden bythe corner plate F, there is no necessity for even cutting them smoothor square. Thus it is possible to cut and assemble these strips rapidlyand with unskilled labor.

In order to prevent any increased thickness at the corners on account ofplates F, it is preferred to employ the construction shown in Fig. 3. Byreference to this figure it will be seen that the channel in the cornerpieces is deeper at the point 3, ad jacent the corner, than at thepoints 3, adjacent the side members, and from the bottom of the channelat its deepest point rises a boss 4 to a height somewhat greater thanthe thickness of the holding strip D. The corner plate F rests upon thisboss 4, and is held in position by means of a screw 5. By virtue of theincreased depth of the channel adjacent the boss, it is thus possible tokeep the upper surface of the plate F below the level of the flange 2,thus producing a flush, smooth structure without any projecting parts.The strip D is sufficiently flexible to bend downwardly into thedeepened portion of the channel and under the plate F, as clearly shownin Fig. 3, the upper surface of such plate being substantially in thesame plane as the outer surface of the holding strip D where it lies inthe channels of normal depth in the side members.

In Figs. 5 and 6 there is shown a different form of wire holdingmolding, such molding consisting of a relatively thick portion 8, (Fig.6) provided with a relatively thin, longitudinally extending, laterallyprojecting lip 9, which is arranged to overlie the inner flange 1 of theframe. As shown in the drawings,this molding may conveniently be formedof a strip of sheet metal, folded over upon itself. A slightly modifiedform of corner plate F is employed and the ends of the molding mayeither abut against this plate or project under it, as desired. In thisconstruction also, it will be observed that there are no parts whichproject beyond the level of the outer flange 2.

What I claim is:

1. In a screen, a rigid metal frame, channel-shaped in cross section, awire holding strip lying in the channel, and a corner plate overlyingthe ends of such strip, the outer surfaces of such strip and cornerplate being below the level of the outer flange of said channel-shapedframe.

2. A screen frame, channel-shaped in cross section, an integral bossrising from the bottom of the channel at each corner of the frame, wireholding strips lying in the channel and having their ends terminatingadjacent such boss, and a'cover plate secured to said boss and overlyingthe said ends of the strips.

3. A screen frame, channel-shaped in cross section, an integral bossrising from the bottom of the channel at each corner of the frame, wireholding strips lying in the channel and having their ends terminatingadjacentsuch boss, and a corner plate secured to said boss.

4. A screen frame, channel-shaped in cross section, such channel beingdeeper at the corners than at the middle of the sides of said frame, anda wire holding strip in the channel.

. 5. A screen frame, channel-shaped in cross section, such channel beingdeeper at the corners than at the middle of the sides of said frame, awire holding strip in said channel, a boss rising from the bottom ofsaid channel to a height slightly greater than the thickness of saidstrip, and a cover plate secured to said boss.

6. A screen frame of channel shape in cross section, a wire holdingstrip lying in said channel below the level of the outer flange thereof,and a cover-plate arranged to overlie the ends of such strip at thecorners of the frame, the channel being deeper at f such points, wherebythe said plates also lie below the level of the outer flange of thechannel.

7. In a screen, a channel-shaped frame having the inner flange lowerthan the outer, and a wire holding molding comprising a strip of sheetmetal bent over upon itself, and provided with a lip adapted to overliethe said inner flange of such channel-shaped frame.

In testimony whereof I have aflixed my signature, in presence of twowitnesses.

EDWARD T. BUBROWES.

Witnesses:

IDA S. MoNArRN, NELLIE E. REABDON.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents Washington, D. c."

